feat(chart): add rendering feature module for DrawingML charts

This module renders DrawingML chart blocks as inline SVG elements, supporting various chart types with performance guardrails in place.

Author: ggdaltoso

packages/layout-engine/painters/dom/src/features/chart/index.ts

@@ -0,0 +1,26 @@
+/**
+ * Chart — rendering feature module
+ *
+ * Renders DrawingML chart blocks as inline SVG elements.
+ * Supports bar/column, line, area, pie, doughnut, scatter, bubble,
+ * radar, and stock charts, with a placeholder fallback for unsupported types.
+ *
+ * Performance guardrails:
+ * - Max 20 rendered series
+ * - Max 500 data points per series
+ * - Max 5,000 SVG elements per chart
+ *
+ * @ooxml c:barChart     — bar and column charts (ECMA-376 §21.2.2.16)
+ * @ooxml c:lineChart    — line charts (ECMA-376 §21.2.2.81)
+ * @ooxml c:stockChart   — stock charts (ECMA-376 §21.2.2.157)
+ * @ooxml c:areaChart    — area charts (ECMA-376 §21.2.2.1)
+ * @ooxml c:scatterChart — scatter charts (ECMA-376 §21.2.2.147)
+ * @ooxml c:bubbleChart  — bubble charts (ECMA-376 §21.2.2.20)
+ * @ooxml c:radarChart   — radar charts (ECMA-376 §21.2.2.132)
+ * @ooxml c:pieChart     — pie charts (ECMA-376 §21.2.2.126)
+ * @ooxml c:doughnutChart — doughnut charts (ECMA-376 §21.2.2.50)
+ * @ooxml c:ofPieChart   — bar-of-pie / pie-of-pie charts (ECMA-376 §21.2.2.111)
+ * @spec  ECMA-376 §21.2 (DrawingML Charts)
+ */
+
+export { createChartElement, createChartPlaceholder, formatTickValue } from '../../chart-renderer.js';